Drill-holder.



N0.'686,534. Patented Nov. 12, I901.

W. D. REARWIN.

DRILL HOLDER.

(Application filed Aug. 24, 1901.]

(No Model.)

w: mums PETERS cc F'NOTO-QTHQ. WASHINGTON, u. c.

UNITED STATES PATENT OFFICE.

WILBER D. REARWIN, OF PITTSBURG, PENNSYLVANIA.

DRILL-HOLDER.

SPECIFICATION forming part of Letters Patent No. 686,534, dated November 12, 1901. Application filed August 24,1901. Serial No. 73,169- (No'modeh) To all whom it may concern:

Be it known that I, WILBER D. REARWIN, a citizen of the United States of America, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Drill- Holders, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to certain new and useful improvements in drill-holders, and relates more particularly to tool-holders used for drilling, reaming, and counterboring and is adapted to be operated to forcibly remove the tool from the holder when desired.

Another object of my invention is to construct a holder that will tightly grasp a tool and retain the same in a firm and rigid position, preventing the drill from wabbling and producing a bore of uniform thickness throughout the object to be bored or reamed.

The invention further aims to construct a device of this character that will be extremely simple in construction, strong, durable, and comparatively inexpensive to manufacture.

With the above and other objects in view the invention consists in the novel combination and arrangement of parts to be hereinafter more fully described, and specifically pointed out in the claim.

In describing the invention in detail reference is had to the accompanying drawings, forming a part of this specification, and wherein like numerals of reference indicate corresponding parts throughout the several views, in which-- Figure 1 is a side elevation of a lathe having my improved holder attached thereto. Fig. 2 is an enlarged side elevation of the holder with the clamp and handle removed therefrom. Fig. 3 isavertical sectional view thereof. Fig. 4 is an end view. Fig. 5 is a similar view ofthe other end of the holder. Fig. 6 is a side elevation of the holder and clamp and handle, showing the latter partially broken away. Fig. 7 is a side elevation thereof.

In the drawings the reference numeral 1 represents a lathe.

2 represents the drill, and 3 indicates the object to be bored or reamed.

The reference numeral 4 represents the holder proper, which is cylindrical in form and is hollow, said holder having formed therein a series of slots 5 5, extending longitudinally in alinement with the body portion of the holder. The said holder is also provided with a collar 6, formed integral therewith, to receive a clamp 7, said clamp carrying lugs 8 for the reception of a set-screw 9, serving to securely fasten the clamp upon the collar 6. This clamp 7 also carries an operating-handle 10, extending downwardly from the holder.

The manner of operating my improved drill-holder is as follows: The cylindrical holder being slotted will lend sufficient resistance to the holder to securely clamp the shank of the drill, which may be guided by means of the handle 10; The advantage of this device resides in the increased facility with which the tool is placed in position for drilling, reaming, counterboring, or the like.

The many advantages obtained by the use of my improved drill-holder will be readily apparent from the foregoing description, taken in connection with the accompanying drawings. v

i It will be noted that various changes may be made in the details of construction without departing from the general spirit of my invention.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-=- In a drill-holder, the combination of a cylindrical holder having a series of longitudinal slots formed therein, a collar formed integral with said holder, a clamp secured upon said collar, and a handle attached to said clamp, all parts being arranged and operate ing substantially as described and for the purpose set forth.

In testimony whereof I affix my signature in the presence of two witnesses.

WILBER D. REARWIN.

Witnesses: I

JOHN NOLAND, 'E. E. POTTER. 

